Where in the United States is there measurable evidence that the plates are moving realtive to one another?
California along the fault lines shows measurable evidence that the plates are moving.
Check this information about the San Andreas Fault.
http://pubs.usgs.gov/gip/earthq3/what.html
san andreas fault 69 in california
To find a location in the United States where there is measurable evidence of plates moving relative to one another, you can look for areas along tectonic plate boundaries. The United States has several plate boundaries where such movement is observed. Here's how you can identify these areas:
1. Research Plate Boundaries: Start by studying the major tectonic plates and their boundaries. The United States is mainly located on the North American Plate, but there are neighboring plates that interact with it.
2. Identify Plate Boundary Types: There are three main types of plate boundaries: divergent, convergent, and transform. Divergent boundaries occur where plates move apart, convergent boundaries are where plates collide, and transform boundaries are where plates slide past each other horizontally.
3. Divergent Boundaries: In the United States, a well-known divergent boundary is the Mid-Atlantic Ridge, which extends into the waters of the Atlantic Ocean. However, this boundary is not directly observable on land within the United States.
4. Convergent Boundaries: Convergent boundaries are areas where plates collide, leading to the formation of mountains, volcanoes, and other geologic features. Examples of convergent boundaries in the United States include the subduction zones along the West Coast, such as the Cascadia Subduction Zone in the Pacific Northwest and the subduction zone in Alaska.
5. Transform Boundaries: Transform boundaries are characterized by horizontal movement between plates. The San Andreas Fault in California is a well-known example of a transform boundary in the United States, where the Pacific Plate and the North American Plate slide past each other.
In summary, measurable evidence of plates moving relative to one another can be found at convergent boundaries (e.g., subduction zones) and transform boundaries (e.g., the San Andreas Fault) in the United States. These areas often experience earthquakes, volcanic activity, and other geologic phenomena that provide tangible evidence of plate tectonics.